There are several ways that forensics experts may match a written document to a suspect, but here are two common methods:
1. Handwriting analysis: Forensic handwriting analysis involves examining the handwriting on the document and comparing it to the handwriting of the suspect. The expert looks for similarities and differences in the size, shape, slant, spacing, and other characteristics of the writing. They may also examine the pressure, speed, and rhythm of the writing. The expert may use a microscope or other magnifying tool to examine the details of the writing. By comparing the handwriting on the document to the known handwriting of the suspect, the expert may be able to determine whether the suspect wrote the document.
2. Linguistic analysis: Forensic linguistic analysis involves examining the language and style of the writing on the document and comparing it to the language and style of the suspect's known writing. The expert looks for patterns in the vocabulary, syntax, grammar, punctuation, and other features of the writing. They may also examine the content and context of the writing to look for clues about the author's identity. By comparing the writing on the document to the known writing of the suspect, the expert may be able to determine whether the suspect wrote the document.